package com.liuxingzhiwu.ruijishangcheng.config;

import com.liuxingzhiwu.ruijishangcheng.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;

@Configuration
@Slf4j
public class WebMvcConfig implements WebMvcConfigurer {

    /**
     * 设置静态资源映射
     * @param
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始静态资源映射");
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");  // 这是默认的配置
    }


    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter =  new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架转换器集合中
        converters.add(0,messageConverter);  //放在最前面  -------------  （也可以在实体类属性上添加注解 @JsonSerialize(using = ToStringSerializer.class) ）
    }
}
